Create F1 help for custom ABAP programs at field level. This method can help companies to eliminate the off-line
documentation for custom programs. On top of that, users are not required to search for help documentation for a custom program. Logo is: "Press F1 for help anywhere in SAP".
This is done by using "help-request" events. Sample code:
at selection-screen on help-request for <Field-Name>
message xxxx (ZZ)
You can maintain messages with varied degree of details here. You can also specify examples in messages long text to clarify the contents of program to your valued users.